Plato was a socilist extremist....
To appreciate the benefit of such an institution a man requires to be well educated; for he certainly will not make a fortune in our state, in which all illiberal occupations are forbidden to freemen. The law also provides that no private person shall have gold or silver, except a little coin for daily use, which will not pass current in other countries.
The state must also possess a currency, but this is only to be used in defraying the expenses of expeditions, or of embassies, or while a man is on foreign travels; but in the latter case he must deliver up what is over, when he comes back, to the treasury in return for an equal amount of local currency, on pain of losing the sum in question; and he who does not inform against an offender is to be mulcted in a like sum.
No money is to be given or taken as a dowry, or to be lent on interest. The law will not protect a man in recovering either interest or principal. All these regulations imply that the aim of the legislator is not to make the city as rich or as mighty as possible, but the best and happiest. Now men can hardly be at the same time very virtuous and very rich. And why? Because he who makes twice as much and saves twice as much as he ought, receiving where he ought not and not spending where he ought, will be at least twice as rich as he who makes money where he ought, and spends where he ought.
On the other hand, an utterly bad man is generally profligate and poor, while he who acquires honestly, and spends what he acquires on noble objects, can hardly be very rich. A very rich man is therefore not a good man, and therefore not a happy one. But the object of our laws is to make the citizens as friendly and happy as possible, which they cannot be if they are always at law and injuring each other in the pursuit of gain.
And therefore we say that there is to be no silver or gold in the state, nor usury, nor the rearing of the meaner kinds of live-stock, but only agriculture, and only so much of this as will not lead men to neglect that for the sake of which money is made, first the soul and afterwards the body; neither of which are good for much without music and gymnastic. Money is to be held in honour last or third; the highest interests being those of the soul, and in the second class are to be ranked those of the body. This is the true order of legislation, which would be inverted by placing health before temperance, and wealth before health.